From various guides and ship trees we can see a pattern:
1. The Colorado's 16" gunset is not the historical one, it is using the CC Lexington guns.
2. All EBBs, with the sole exception of the EBB1s, are ridiculously unrealistic. Ise with twelve 16", Yamato with Dual 20.1" and a 1952 version of a ship that was never built in the first place? Yes, that totally happend.
3. Ships are so ridiculously fast they're simply defying all known limits of ships. A South Dakota class is a "Fast Battleship" IRL, sure, but it doesn't go 47knt. Its max speed is ~28knt and actually slower than the Iowa (33knt)
Conclusion: NF =/= Real Life, which is something that has been said for the last 10 years.
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Let's not stop at that, you want REALISM? Sure, let's go through this checklist for the USN:
1. Full-auto-FCS capable of maintaining fire solution even through a high-speed 450-degree turn (demonstrated by North Carolina during an exercise IRL)
2. Proximity fuse for large caliber AA (shared with RN, which means all other nations must score DIRECT hits)
3. Auto-fire large caliber AA (again, radar-based firing computers)
4. Better aircraft efficiency at night (USN was the most advanced in carrier night ops during WW2)
5. Decreased sight range, marking range and accuracy penalty at night (USN radar-based fire computer works in all weather)
6. MASSIVE AAW rating advantage along with RN (you guessed it, radar fire control)
I'm sincerely waiting for a realistic naval sim, because an USN not nerfed by balancing efforts will decimate everyone else sans RN combined without even trying, especially at late-war tech levels.
Source: Combined Fleet - Best Battleship